Scale Wendell Hostetler 30% Piper Cherokee Glass Fuselage Build.

[TonyHallo]

Real old stock! I think they burnt down before y2k.

 

[TonyHallo]

Mounted the nose wheel servo and finished the linkage. Milled a 5/32" hex on the end of the 10-32 stud to allow use of a 5/32" hex driver. Next moving on to powering the servos and ignition from the RB30+ redundancy bus mounted under the back seats.

 

[TonyHallo]

Before doing the powering work, decided to fab up the cooling duct. I fellow over on the RC Scalebuilder site provided a copy of the file he used to cut a baffle for his FG61TS mounted on BUSA Ercoupe. Had a local fellow cut it out on a laser cutter, this will be attached to the duct section mounted to firewall.

 

[TonyHallo]

Pulled the dust out of the form, the form was covered with clear packing tape. The baffle will get tacked in place then glassed on the inside, then final

 

[dhal22]

Fascinating……

 

[Snoopy1]

Nice work. How much cloth did you use or better how many layers and the weight of the cloth.
so all the cooling air has to go through the hole on the firewall into the fuselage. And the cowl around the engine is basically sealed Pressure chamber.

 

[TonyHallo]

The duct is two layers of 4 ounce cloth, the baffle plate is a little heavier, don't remember exactly thinking 12 ounces of cloth. The original file for the baffle plate had fingers that extended into the heat sink on the bottom of the crankcase, see the pdf attached. I eliminated the fingers to ensure cooling of the crankcase. This engine is a glow engine converted to gas my the OEM, the FA-300 doesn't have the heat sink while the gas version does si it must be there for a reason.

"so all the cooling air has to go through the hole on the firewall into the fuselage. And the cowl around the engine is basically sealed Pressure chamber."

Correct, the area behind the cowl will be sealed for the cockpit area with another barrier plate that will screw to the former on the outer edge of the photo. The hot air exits from the bottom. The ends at the exhaust tube and has the air dam built in.

 

[TonyHallo]

Moved on to the door latch. Laid out the location of latch, then decided a backing was necessary, made up a quick balsa plug that will be laid up and glued in from the back side. Brainstorming various latch mechanisms, thinking it might be a square brass tube and bar with a strike plate in the jam. Need to source some tube for prototyping.

 

[dhal22]

Building season kicks into full swing........

 

[Snoopy1]

Tony the way you have baffled the engine have you done it this way before. I have done it twice and it did not work out to well for me. The last plane I did it on was GP 330 Extra with a DA100 which I did a build thread on. The cooling did not work out. Be interested in your thoughts.